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    <script>
        // 下面是另一个例子。
        // [
        //     [1, 2],
        //     [3, 4]
        // ].map(([a, b]) => a + b);
        // [ 3, 7 ]
        let hh=[[1, 2], [3, 4],[5,5]].map(function([a, b]){
            console.log(a,b);
            return a + b
        })
        console.log(hh);
    </script>
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